You’re right that Knight’s study being entirely determined by the owner’s own opinions could result in biased results. It seems like there’s not really much comprehensive research in regards to the health effects, whether adverse, beneficial, or neutral of vegan cat food on cats. This review [1] is fairly recent and points to that.

[1] https://www.mdpi.com/2306-7381/10/1/52

Could you outline the specific differences between processed kibble / wet cat food and processed vegan cat food that make you believe the latter is worse for the cat than the former? You could link a recent study on the matter to help us understand your concerns.

It’s an unofficial open-source daemon used by alternative Spotify clients. I used it once for a terminal Spotify client. It’s a pretty neat piece of software.